Roller blind device

ABSTRACT

The present invention relates to a roller blind device, which comprises a special curtain. The roller blind device also comprises a first circular tube for fixing the upper end of the special curtain and a second circular tube for fixing the lower end of the special curtain. A torsion spiral which is capable of rolling up the special curtain and a stop means for lifting the second circular tube are arranged in the second circular tube. Such structure ensures that the roller blind device can roll up a plurality of roller blind curtains or show one of the plurality of roller blind curtains.

FIELD OF THE INVENTION

The present invention relates to a roller blind device, morespecifically, to a roller blind device with a plurality of roller blindcurtains which can be rolled up or one of which can be shown.

BACKGROUND OF THE INVENTION

A common roller blind is generally classified as a manual one and anelectric one. The roller blind shown in FIG. 1 is a manual roller blind.The upper end of a common curtain 4 is fixed to a first circular tube 1through an adhesive tape and the lower end of the common curtain 4 isfixed to a bottom bar 5. A user can pull a chain to rotate a driverwhich subsequently rotates the first circular tube 1 to roll up thecommon curtain onto the first circular tube 1 or to unfold the commoncurtain 4 away from the first circular tube 1. In this way, the user canchoose to roll up or show the common curtain 4 with a size equivalent tothat of the window.

FIG. 2 shows an electrical roller blind, which uses a tubular electricalmotor to rotate the first circular tube 1. The user can choose to rollup or show one common curtain 4 with a size equivalent to that of thewindow.

Same or different curtain materials can be jointed together to form acommon curtain 4 utilizing an adhesive or sewing or ultrasonic welding.

The present roller blind devices have their own drawbacks and problems,such as they can only roll up or show one common curtain 4 with a sizeequivalent to that of the window.

SUMMARY OF THE INVENTION

The objective of the present invention is to provide a roller blinddevice which can roll up a plurality of roller blind curtains or showone of the plurality of roller blind curtains, aiming at the problems inthe prior art that the above mentioned roller blind device can only rollup or show one common curtain.

According to an aspect, a roller blind device is provided, whichcomprising a special curtain; a first circular tube for fixing an upperend of the special curtain and a second circular tube for fixing a lowerend of the special curtain; a torsion spiral which is capable of rollingup the special curtain and a stop element for lifting the secondcircular tube are arranged in the second circular tube.

In the roller blind device of the present invention, the roller blinddevice comprises an iron baffle, on both ends of which a firstconnection plate of “Z” shape of a left flexing iron plate and a secondconnection plate of “Z” shape of a right flexing iron plate are fixed;an included angle between the first connection plate and a first bendingplate connected together is a right angle, an included angle between thefirst bending plate and a third connection plate connected together is aright angle, an included angle between the second connection plate and asecond bending plate connected together is a right angle and an includedangle between the second bending plate and a fourth connection plateconnected together is a right angle; the right flexing iron plate is amirror of the left flexing iron plate, and two circular iron shafts arefixed symmetrically on the first bending plate and the second bendingplate.

In the roller blind device of the present invention, the circular ironshaft comprises a stepped circular shaft; a free-rotating nylon bearingwith a groove and a projecting edge for fixing a ribbing and a sectionof the second circular tube respectively on its external surface, isarranged outside of the stepped circular shaft.

In the roller blind device of the present invention, the left end of aniron square shaft is fixed in the centre square hole of the leftcircular iron shaft; the iron square shaft is inserted into the rightend square hole of the torsion spiral, the left end post of the torsionspiral is fixed in the right side hole of the left nylon bearing.

In the roller blind device of the present invention, the stop elementcomprises an iron connecting element which is permanently connected withthe right end hole of the iron square shaft; an iron screw shaft, theright end of which is cut into a square stem and fixed in the centresquare hole of a right circular iron shaft while the left end hole isfixed in the iron connecting element; a nylon supporting runner providedwith a groove outside to clamp tightly in the ribbing inside the secondcircular tube and a circular hole inside to rotate outside of the ironconnecting element; and an iron distance-metering gear provided with agroove outside to slide along the ribbing inside the second circulartube and a screw hole at the centre to rotate around the iron screwshaft, the iron distance-metering gear breaks away from or combines withthe iron connecting element to enable the second circular tube to rotateor to be lifted and move up and down.

In the roller blind device of the present invention, the weight of theiron baffle is maintained approximately stable with the second circulartube and its internal components by taking the right flexing iron plateor the left flexing iron plate as a lever and taking the special curtainas a fulcrum.

In the roller blind device of the present invention, the locations andweights of the torsion spiral, the iron distance-metering gear, thenylon supporting runner and the iron connecting element are maintainedapproximately stable by taking the second circular tube as a lever andtaking the centre of the special curtain as a fulcrum.

In the roller blind device of the present invention, the both ends ofthe iron baffle move up and down in the vertical direction along groovesof aluminium alloy tracks of “F” shape on both sides; both flat surfacesof the aluminium alloy track of “F” shape are not reflective.

In the roller blind device of the present invention, the special curtainis made of at least two different curtain materials which are slightlyhigher than the window.

In the roller blind device of the present invention, there is a circularhole on each of the third connection plate and the fourth connectionplate; the circular hole can slide to two iron cones at the same levelof the windowsill; the third connection plate and the fourth connectionplate fix a bar of supporting aluminium alloy corner by a rivet at thesame time.

Implementing the roller blind in the present invention, advantage that aplurality of roller blind curtains can be rolled up or one of which canbe shown, can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described in the following withreference to the accompanying drawings and embodiments. In the Figures:

FIG. 1 is a structure diagram of the manual roller blind of the priorart;

FIG. 2 is a structure diagram of the electric roller blind of the priorart;

FIG. 3A is the section diagram of the E in FIG. 3B;

FIG. 3B is the section diagram of the D in FIG. 3A;

FIG. 3C is the exemplary front view for the left flexing iron plate ofthe first embodiment of the roller blind device in the presentinvention, respectively;

FIGS. 4 to 6 are the exemplary vertical view, front view and right viewfor the right flexing iron plate of the first embodiment of the rollerblind device in the present invention, respectively;

FIGS. 7 to 8 are the exemplary front view and right view for the ironbaffle of the first embodiment of the roller blind device in the presentinvention, respectively;

FIGS. 9 to 10 are the exemplary front view and right view for thecircular iron shaft of the first embodiment of the roller blind devicein the present invention, respectively;

FIGS. 11 to 12 are the exemplary front view and right view for the nylonbearing of the first embodiment of the roller blind device in thepresent invention, respectively;

FIGS. 13 to 14 are the exemplary front view and left view for the ironconnecting element of the first embodiment of the roller blind device inthe present invention, respectively;

FIGS. 15 to 16 are the exemplary front view and left view for the secondcircular tube of the first embodiment of the roller blind device in thepresent invention, respectively;

FIGS. 17 to 18 are the exemplary front view and left view for the irondistance-metering runner of the first embodiment of the roller blinddevice in the present invention, respectively;

FIGS. 19 to 20 are the exemplary front view and left view for the nylonsupporting runner of the first embodiment of the roller blind device inthe present invention, respectively;

FIGS. 21 to 22 are the exemplary front view and right view for thetorsion spiral of the first embodiment of the roller blind device in thepresent invention, respectively;

FIGS. 23 to 24 are the exemplary vertical view and front view for thealuminium alloy track of F shape of the first embodiment of the rollerblind device in the present invention, respectively;

FIGS. 25 to 26 are the exemplary vertical view and front view for theiron cone of the first embodiment of the roller blind device in thepresent invention, respectively;

FIGS. 27 to 28 are the exemplary vertical view and right view for thenylon sheet of the first embodiment of the roller blind device in thepresent invention, respectively;

FIGS. 29 to 30 are the exemplary front view and right view for the ironscrew shaft of the first embodiment of the roller blind device in thepresent invention, respectively;

FIGS. 31 to 32 are the exemplary front view and right view for the ironsquare shaft of the first embodiment of the roller blind device in thepresent invention, respectively;

FIG. 33 is the exemplary operation diagram for the step 1 to step 7 inthe first embodiment of the roller blind device in the presentinvention;

FIG. 33A is the exemplary diagram for the locations of the components ofthe stop element from step 1 to step 3 in the first embodiment of theroller blind device in the present invention;

FIG. 33B and FIG. 33C are the exemplary diagrams for the locations ofthe components of the stop element from step 4 to step 7 in the firstembodiment of the roller blind device in the present invention;

FIG. 34 is the exemplary operation diagram for the step 8 to step 13 inthe first embodiment of the roller blind device in the presentinvention;

FIG. 34A and FIG. 34B are the exemplary diagrams for the locations ofthe components of the stop element from step 8 to step 10 in the firstembodiment of the roller blind device in the present invention;

FIG. 34C is the exemplary diagram for the locations of the components ofthe stop element from step 11 to step 13 in the first embodiment of theroller blind device in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following components can be selected and used in the roller blinddevice a required:

Reference number for the accompanying drawing Component 1 A firstcircular tube 1 2 Windowsill 2 3 Window frame 3 4 Curtain of a commonroller blind 4 5 Bottom bar of a common roller blind 5 10 Stop element10 12 Iron distance-metering runner 12 13 Nylon supporting runner 13 14Iron connecting element 14 17 Nylon bearing 17 20 Special curtain 20 31Iron screw shaft 31 32 Iron square shaft 32 36 Circular iron shaft 36 37Torsion spiral 37 39 A second circular tube 39 49 Left flexing ironplate 49 50 Right flexing iron plate 50 51 Iron baffle 51 52 Aluminiumalloy track of F shape 52 53 Iron cone 53 54 Option: nylon sheet 54 55Supporting aluminium alloy corner 55 56 Option: security hard frostedscreen 56 57 Option: wool top 57

The same reference number for the accompanying drawing in the specificembodiment and the prior art represents the same object.

The present invention will be illustrated detailedly in the followingwith reference to the accompanying drawings 3A-34C.

Component 1, namely “a first circular tube 1” is an aluminium alloycircular tube used in a common electric or manual roller blind. Anadhesive tape is usually used to fix the roller blind curtain to thesurface of the circular tube.

Component 2, namely “windowsill 2” is a common windowsill or floor whichcan fix the iron cone 53.

Component 3, namely “window ribbing 3” is a common window frame or wallwhich can fix the aluminium alloy track of F shape 52.

Component 4, namely “curtain of a common roller blind 4” is the curtainof a common roller blind which has different options including color,pattern, and transparence and so on. The same or different curtainmaterials can be jointed together to be one common curtain 4 byutilizing an adhesive or sewing or ultrasonic welding.

Component 12, namely “iron distance-metering runner 12” is a thinelectroplated iron cylinder having an outer shape which is the same asbut smaller than the internal shape of the second circular tube 39, andtherefore the iron distance-metering runner 12 can slide in the secondcircular tube 39 easily. The iron distance-metering runner 12 isprovided with a groove 122 outside and therefore can slide along theribbing 391 inside the second circular tube 39. The irondistance-metering runner 12 is further provided with a thread 121 at thecentre and therefore can rotate around the iron screw shaft 31. The irondistance-metering runner 12 can break away from or combine with the ironconnecting element 14, so as to enable the second circular tube 39 torotate or to be lifted and move up and down.

Component 13, namely “nylon supporting runner 13” is a thin nyloncylinder having an outer shape which is the same as but slightly smallerthan the internal shape of the second circular tube 39, and thereforethe iron distance-metering runner 12 can slide in the second circulartube 39 easily. The nylon supporting runner 13 is provided with a groove132 outside and therefore can slide along the ribbing 391 inside thesecond circular tube 39. The nylon supporting runner 13 is furtherprovided with a circular hole 131 at the centre and therefore can rotatearound the iron connecting element 14. The nylon supporting runner 13also supports the pressure between the second circular tube 39 and theiron connecting element 14.

Component 14, namely “iron connecting element 14” is an electroplatedcylinder with a projecting ring 141 at the right end. The externaldiameter 142 can match the circular hole 131 of the nylon supportingrunner 13. A screw hole 143 which can match the iron screw shaft 31 isarranged at one end of the centre of the right side. A square hole 144which can match the iron square shaft 32 is arranged at the centre ofthe left side. The iron screw shaft 31, the iron square shaft 32, thering 141 and the nylon supporting runner 13 can be fixed by iron wirespassing through the two circular holes 145.

Component 17, namely “nylon bearing 17” is a nylon circular bearingprovided with a groove 171 and a projecting edge 172 for fixing theribbing 391 and section inside the second circular tube 39 respectively.Two concentric circular holes 174 having different sizes and enablingthe circular iron shaft 36 to rotate are arranged at the centre of theleft end. A circular hole 173, the diameter of which is larger thanthose of the iron screw shaft 31 and the iron square shaft 32, isarranged at the centre of the right end. A right side hole 175 which canfix the extension column 372 of the torsion spiral 37 is provided at theleft end of the nylon bearing 17.

Component 20, namely “special curtain 20” is a roller blind curtainformed by vertically jointing two or more roller blind curtains withdifferent properties and each height slightly higher than the window.The width of the special curtain 20 is smaller than that of the secondcircular tube 39.

Component 31, namely “iron screw shaft 31” is an electroplated ironscrew shaft with its right end cut into a square stem 311 and a left endhole 312 arranged at its left end. For example, if the special curtain20 is formed by vertically jointing three roller blind curtains, whichare slightly higher than the window, the minimum length of the ironscrew shaft 31 can enable the iron distance-metering runner 12 torotate, so as to roll up at least two (three minus one) roller blindcurtains.

Component 32, namely “iron square shaft 32” is an electroplated squareiron shaft having a right end hole 321 at its right end.

Component 36, namely “iron shaft 36” is an electroplated iron circularshaft. The electroplated iron circular shaft has a right end 363 with asmaller diameter which enables the circular hole 174 inside the nylonbearing 17 to rotate, and a left end with a larger diameter and twoscrew holes 362 matching the left flexing iron plate 49 or the rightflexing iron plate 50. A square hole 361 enabling the insertion of theleft end 322 of the iron square shaft 32 or the right square stem 311 ofthe iron screw shaft 31 is provided at the center of the iron shaft 36.

Component 37, namely “torsion spiral 37” is a torsion spiral forproviding torsion to the second circular tube 39. An extension column372 extending radically outward is arranged at the left end of thetorsion spiral 37. The extension column 372 is inserted into the hole175 of the nylon bearing 17, and then fixed by a pinch cock and a selftapping screw. An iron piece is arranged at the right end of the torsionspiral 37 and a square hole 371 which is slightly larger than the ironsquare shaft 32 is arranged at the centre of the torsion spiral 37. Agear group, such as 1:2 can be arranged optionally to reduce the neededrevolution time of the torsion spiral.

Component 39, namely “a second circular tube 39” is an aluminium alloycircular tube having one or two ribbings 391 inside.

Component 49, namely “left flexing iron plate 49” is a first connectionplate of Z shape 491. The included angle between the left flexing ironplate 49 and the first bending plate 492 connected together is a rightangle, and the included angle between the first bending plate 492 andthe third connection plate 493 connected together is a right angle. Thefirst connection plate 491 is provided with two holes 4911 and the firstbending plate 492 is provided with two holes 4921 while the thirdconnection plate 493 is provided with a large circular hole 4931 and twoholes 4932.

Component 50, namely “right flexing iron plate 50” is a secondconnection plate of Z shape 501. The included angle between the rightflexing iron plate 50 and the second bending plate 502 connectedtogether is a right angle, and the included angle between the secondbending plate 502 and the fourth connection plate 503 connected togetheris a right angle. The second connection plate 501 is provided with twoholes 5011 and the second bending plate 502 is provided with two holes5021 while the fourth connection plate 503 is provided with a largecircular hole 5031 and two holes 5032. The left flexing iron plate 49 isthe mirror of the right flexing iron plate 50.

Component 51, namely “iron baffle 51” is a piece of long iron sheethaving two holes 511 at both ends. When the special curtain 20 lifts thesecond circular tube 39, the moment of inertia of the iron baffle 51 isapproximately the same as those of the second circular tube 39 and itsinternal components. The moment of inertia can be adjusted by changingthe height or the thickness of the iron baffle. The left and right endsof the iron baffle 51 can be covered with a nylon sheath to reduce thenoise produced when it collides with the aluminium alloy track of Fshape 52. An iron horn or an iron groove can be used to enhancestrength.

Component 52, namely “aluminium alloy track of F shape 52” is a sidetrough of F shape. The left and right ends of the iron baffle 51 caninsert into the groove of U shape 522. A screw is used to fix thealuminium alloy track of F shape 52 to the window ribbing 3 via passingthrough the groove of U shape 522. The aluminium alloy track of F shape52 has two flat surfaces which are not reflective, such as black, toeliminate the reflected sunshine.

Component 53, namely “iron cone 53” can be fixed to the windowsill 2 bya flat screw passing through a hole 532. The horizontal height of theiron cone 53 can be adjusted by a circle at the bottom. A cone 531 canpass through the large circular hole 5031 of the right flexing ironplate 50 (the large circular 4931 of the left flexing iron plate 49).

Component 54, namely “nylon sheet 54” is a piece of rectangular nylonsheet which can reduce the noise produced when the left flexing ironplate 49 (and right flexing iron plate 50) strikes the iron cone 53. Thenylon sheet 54 is provided with three circular holes, the position anddiameter of which are the same as those of the third connection plate493 of the left flexing iron plate 49 (the fourth connection 503 of theright flexing iron plate 50), but among which the central hole can matchthe upward flat screw. The nylon sheet 54 is optional.

Component 55, namely “supporting aluminium corner 55” is an aluminiumalloy corner. A hole is arranged at the bottoms of the left and rightends, respectively.

Component 56, namely “security hard frosted screen 56” is a hard nylonfrosted screen fixed on the top of the iron baffle 51. Such arrangementcan prevent children or users from putting their hands or fingers intothe rolling up device. This component is optional.

Component 57, namely “wool top 57” is a common light-blocking wool topwhich is fixed at the bottom of the iron baffle 51 and covers the gapbetween the iron baffle 51 and the windowsill 2. The wool top 57 isoptional.

A first specific embodiment will be described as follows.

A common roller blind device is assembled without utilizing the commoncurtain 4 and the bottom bar 5. By means of an adhesive or a sewingmachine, three different roller blind curtains are connected into aspecial curtain 20, the upper end of which is fixed to the firstcircular tube 1 of a common roller blind. Then the special curtain 20 isrolled up to the first circular tube 1 of the common roller blind, onlyhanging the special curtain 20 of approximately 300 mm.

The left end of the iron screw shaft 31 is rotated into the screw hole121 of the iron distance-metering runner 12. The circular hole 131 ofthe nylon supporting runner 13 slides into the external diameter 142 ofthe iron connecting element 14, and a circle is added to the left sideof the nylon supporting runner 13. The left end of the screw shaft 31 isrotated into the right end of the iron connecting element 14 while theright end of the iron square shaft 32 is inserted into the square hole144 at the left end of the iron connecting element 14. Components 14,32, 31 and the circle are fixed by the iron wire that passes through thetwo circular holes 145 of the iron connecting element 14, the right endhole 321 of the iron square shaft 32 and the left end hole 312 of theiron screw shaft 31. Then the iron distance-metering runner 12 isrotated to close with the iron connecting element 14. Supposing that thespecial curtain 20 is made of N curtains, therefore, when the irondistance-metering runner 12 is rotated to be away from the ironconnecting element 14, the revolution number is the one that ensures thespecial curtain 20 to be rolled up onto the second circular tube 39 by aminimum of 300 mm and a maximum of the topmost (N-1) curtains.

The left end post 372 of the torsion spiral 37 is fixed in the rightside hole 175 of the left nylon bearing 17, and then fixed by a pinchcock and a self tapping screw, while the right end square hole slidesinto the iron square shaft 32.

The circular iron shaft 36 and the nylon sheet 54 are fixed to the leftflexing iron plate 49 and the right flexing iron plate 50 via acountersink head screw, a washer and a screw cap.

The left end of the iron square shaft 32 passes through the left nylonbearing 17, then inserts into the square hole 361 of the circular ironshaft 36. Then the installed iron screw shaft 31, iron distance-meteringrunner 12, iron connecting element 14, nylon supporting runner 13, ironsquare shaft 32, torsion spiral 37 and left nylon bearing 17 slide fromthe left side along the ribbing 391 inside the second circular tube 39.The right nylon bearing 17 is fixed to the right side of the secondcircular tube 39. The square stem 311 at the right end of the iron screwshaft 31 is inserted into the square hole 361 of the right circular ironshaft 36.

The iron baffle 51, nylon sheet 54 and aluminium alloy corner 55 arefixed to the left flexing iron plate 49 and the right flexing iron plate50 via a screw or a rivet. The nylon supporting runner 13 is fixed bythe flat screw passing through the second circular tube 39. The edge ofthe screw is firstly abraded to avoid its projection from the secondcircular tube 39.

The iron distance-metering runner 12 is rotated to close with the ironconnecting element 14 and to enable the torsion spiral 37 to create atorsion. By an adhesive tape, the lower end of the special curtain 20 isfixed to the second circular tube 39 which is fixed to the left andright flexing iron plates 49, 50 by an adhesive tape.

When related common roller blind device is installed at building sites,the position of the U shape groove of the aluminium alloy track 52 of Fshape can hitch the both ends of the iron baffle tightly. When thealuminium alloy track 52 of F shape has been fixed to the window frame 3by a self tapping screw or an adhesive, the adhesive tape which fixesthe second circular tube 39 to the left and right flexing iron plate 49,50 is loosened.

The position of the iron cone 53 can match the large circular hole 5031of the right flexing iron plate 50 and the large circular hole 4931 ofthe left flexing iron plate 549 respectively. The horizontal height ofthe windowsill 2 is adjusted by a large circle, and then the iron cone53 is fixed to the windowsill 2 by a screw.

An “up stop position” is set for the roller blind which is controlledand the first circular tube 1 of which is rotated until the Nth curtainof the special curtain 20 is shown. Then a “low stop position” is setfor the roller blind.

When the second circular tube 39 is hung by the special curtain 20, theweight of the iron baffle 51 is maintained approximately stable with thesecond circular tube 39 and its internal components by taking the rightflexing iron plate 50 or the left flexing iron plate 49 as the lever andtaking the special curtain 20 as the fulcrum. On the other hand, thelocations and weights of the torsion spiral 37, the irondistance-metering gear 12, the nylon supporting runner 13 and the ironconnecting element 14 are maintained approximately stable by taking thesecond circular tube 39 as the lever and taking the centre of thespecial curtain 20 as the fulcrum.

Options such as the security hard frosted screen 56 and the wool top 57are fixed as required.

Referring to the accompanying drawings 33, 33A, 33B, 33C, 34, 34A, 34Band 34C, supposing that the special curtain 20 has three differentcurtains: a top curtain 201, a middle curtain and a bottom curtain 203.The height of the window is “h”.

In steps 1-3, the torsion of the torsion spiral 37 is smaller than thatproduced by the weight of the second circular tube 39 and its internalcomponents. The iron distance-metering runner 12 is close to the ironconnecting element 14 and the second circular tube 39 is hung by thespecial curtain 20.

In steps 4-7, the left and right flexing iron plates 49, 50 rest on theiron cone 53. The first circular tube is rotated to pull down thespecial curtain 20. Then the torsion spiral 37 can rotate the secondcircular tube 39 to roll up the special curtain 20. During this, theiron distance-metering runner 12 is rotated away from the ironconnecting element 14.

In steps 8-10, the first circular tube 1 is rotated so that the pulledspecial curtain 20 can pull the second circular tube 30 to rotate. Atthis time, the torsion of the torsion spiral 37 is smaller than thatproduced by the special curtain 20. The iron distance-metering runner 12is rotated close to the iron connecting element 14 again.

In steps 11-13, the second circular tube 39 is hung by the specialcurtain 20. At this time, the torsion of the torsion spiral 37 issmaller than that produced by the special curtain 20. The irondistance-metering runner 12 is close to the iron connecting element 14.

If necessary, a very thin curtain, such as curtains of HAVERKAMPOPALFILM, can be selected for reducing the thickness of the curtain.

Second embodiment of the special curtain: curtains with different colorsor patterns

A user can choose different curtains to be the top curtain 201, themiddle curtain 202 and the bottom curtain 203 based on the color andpattern and so on.

Third embodiment of the special curtain: curtains with differenttransparences are automatically selected according to the intensity ofsunshine.

A user can choose different curtains to be the top curtain 201, themiddle curtain 202 and the bottom curtain 203 according to differenttransparences. For example, the transparence of the top curtain is 1%,the transparence of the middle curtain is 3%, and the transparence ofthe bottom curtain is 10%, respectively. In addition, a system that candetect the intensity of sunshine and rotate the motor to a pre-arrangedposition can be selected and used. Such system includes SMI motor, SOMFYILT motor, LonWorks control system, Mechoshade control system and so on.

Rotation position of the Intensity of Intensity of sunshine firstcircular tube 1 Shown sunshine in front of the up stop position 0%curtain of behind special curtain 20 low stop position the special thespecial (lux) 100% curtain 20 curtain 20 (lux) Weak:  0% Not shown <1000Such as <1000 Low: Approximately Bottom  100-1000 Such as 1000-10000 37%curtain 203 (10%) Middle: Approximately Middle 300-900 Such as 69%curtain 202 10000-30000 (3%) High: 100% Top curtain 300-900 Such as 201(1%) 30000-90000

The invention claimed is:
 1. A roller blind device, comprising a special curtain (20), wherein, said roller blind device also comprises a first circular tube (1) for fixing an upper end of said special curtain (20) and a second circular tube (39) for fixing an lower end of said special curtain (20); a torsion spiral (37) which is capable of rolling up said special curtain (20) and a stop element (10) for stopping a lifting of said second circular tube (39) are arranged in said second circular tube (39); wherein said roller blind device comprises an iron baffle (51), on both ends of which a first connection plate (491) of “Z” shape of a left flexing iron plate (49) and a second connection plate (501) of “Z” shape of a right flexing iron plate (50) are fixed; an included angle between said first connection plate (491) and a first bending plate (492) connected together is a right angle, an included angle between said first bending plate (492) and a third connection plate (493) connected together is a right angle, an included angle between said second connection plate (501) and a second bending plate (502) connected together is a right angle, and an included angle between said second bending plate (502) and a fourth connection plate (503) connected together is a right angle; said right flexing iron plate (50) is a minor of said left flexing iron plate (49), and two circular iron shafts (36) are fixed symmetrically on said first bending plate (492) and said second bending plate (502).
 2. The roller blind device according to claim 1, wherein said circular iron shaft (36) comprises a stepped circular shaft; a free-rotating nylon bearing (17) with a groove (171) and a projecting edge (172) for fixing a ribbing (391) and a section of said second circular tube respectively on its external surface, is arranged outside of said stepped circular shaft.
 3. The roller blind device according to claim 2, wherein the left end (322) of a bar of iron square shaft (32) is fixed in the centre square hole (361) of said left circular iron shaft (36); said iron square shaft (32) is inserted into the right end square hole (371) of the torsion spiral (37), the left end post (372) of the torsion spiral is fixed in the right side hole (175) of said left nylon bearing (17).
 4. The roller blind device according to claim 3, wherein said stop element (10) comprises an iron connecting element (14) which is permanently connected with the right end hole (32) of said iron square shaft (32); an iron screw shaft (31), the right end of which is cut into a square stem (311) and fixed in the centre square hole (361) of said right circular iron shaft (36) while the left end hole (312) of which is fixed in said iron connecting element (14); a nylon supporting runner (13) provided with a groove (132) outside to clamp tightly in the ribbing (39) inside said second circular tube (39) and a circular hole inside to rotate outside of said iron connecting element (14); and an iron distance-metering gear (12) which is provided with a groove (122) outside to slide along the ribbing (391) inside said second circular tube (39) and a screw hole (121) at the centre to rotate around said iron screw shaft (31), said iron distance-metering gear (12) breaks away from or combines with said iron connecting element (14) to enable said second circular tube (39) to rotate or to be lifted and move up and down.
 5. The roller blind device according to claim 4, wherein the weight of said iron baffle (51) is maintained approximately stable with said second circular tube (39) and its internal components by taking said right flexing iron plate (50) or said left flexing iron plate (49) as a lever and taking said special curtain (20) as a fulcrum.
 6. The roller blind device according to claim 4, wherein the locations and weights of said torsion spiral (37), said iron distance-metering gear (12), said nylon supporting runner (13) and said iron connecting element (14) are maintained approximately stable by taking said second circular tube (39) as a lever and taking the centre of said special curtain (20) as a fulcrum.
 7. The roller blind device according to claim 4, wherein the both ends of said iron baffle (51) move up and down in the vertical direction along grooves (522) of aluminium alloy tracks of “F” shape (52) on both sides; the both flat surfaces of said aluminium alloy track of “F” shape are not reflective.
 8. The roller blind device according to claim 1, wherein said special curtain (20) is made of at least two different curtain materials having a length which is slightly higher than a height of the window.
 9. The roller blind device according to claim 1, wherein there is a circular hole (4931, 5031) on each of said third connection plate (493) and said fourth connection plate (503); said circular hole (4931, 5031) can slide to two iron cones (53) at the same level of the windowsill (2); said third connection plate (493) and said fourth connection plate (503) fix a bar of supporting aluminium alloy corner (55) by a rivet at the same time. 